Apparatus for cutting asphalt sheets



March 17, 1931- F. c. .1. DE BOTH APPARATUS FOR CUTTING ASPHALT SHEETS Original Filed June 16, 1927 f@ fm -5- A TTORNEY.

i Patented Mar. 17, 1931 UNITED STATES PATENT .OFFICE FRANSISOUS C. J. DE BOTH, DECEASED, LATE OF NIMWEGEN, NETHERLANDS, BY JACOBUS J'. D. DE BOTH, ADMINISTRATOR, 0F NIMWEGEN, NETHERLANDS; JOHANNES PETRUS MATHEUS DE BOTH NOW ADMINISTRATOR OF SAID FRANSISCUS C. J. DE BOTH, DECEASED APPARATUS FOR CUTTING ASPHALT SHEETS Original application led .Tune 16, 1927, Serial No. 199,314. Patent No. 1,726,215. Divided and this application led April 9, 1928. Serial No. 268,698.

The present invention is a division of an application for patent tiled J une 16th 1927, Serial #199,314, upon Method and apparatus for making and method of applying asphalt plates.

The present invention, in its broad aspect, has reference to improvements in cutting machines for forming asphaltic, bitumastic, asphaltic-granito, and the like, plates, for use as floor, aisle, wall or other surface coverings. Heretofore it has been customary in the art to lay asphaltic coverings in mass, and this has largely been due to the inherent nature of asphalt and bitumen which has rendered it impractical to lay the same in the form of plates. By nature asphalt and bitumen are spongy and inherently resilient, thus resisting efforts to produce plates of uniform size and thickness. and texture. The prior Patent .#1,643,059 granted September 20th 1927, discloses how such plates may be` produced practically, and the present invention points out how the asphalting sheet (as defined in the co-pending application filed April 9th 1928, Serial #268,696) may be cut up into such plates.

Moreparticularly it is the purpose to provide a novel cutting device wherein means are provided for discharging theplate after it has been cut, and wherein means are provided for positively7 controlling the action of the cutter to the end that plates may be cut from a sheet of asphalt stock quickly, cleanly. and economically. and of uniform size and thickness. To this end is provided a cutter. and spring pressed means in conjunction therewith for pressing upon that portion of the surface of the stock which will form the plate, when cut. thus preventing roaching of the plate, and enabling the cutter to define clean edges. The presser also serves as a discharge means for cleaning or removing the plate from the blade, and the means of attaching the cutter head to the machine is concealed back of the presser so that it will not gum-up and be hard to replace or remove. The cutting apparatus, considered in its assembled form, is simple in construction, positive in operation, and may be set up and operated Without greatly modifying ordinary shop practices.

In the drawing wherein is illustrated the preferred embodiment of the invent-ion:

Figure 1 is an assembly view of my cuttinbg apparatus,

igure 2 is a sectional detail of my cutting head, and

Figure 3 is a bottom plan view of the cutter head.

In the drawing wherein like characters of reference are used tok designate like or similar parts throughout the several views.

The cutting ymachine has a base (1), a platform (2), and standards (3) carrying across and journalled in their upper ends a shaft (4). One standard lrises above the other standard to form a supporting eXtension (5). The shaft (4) is slidably mounted in the standards (3) and has keyed thereon spaced discs (6) which are adapted to alternately and frictionally engage the periphery of a driven disc (7) when the shaft is moved by lever connections (8) to control handle (9). The control handle (9) is mounted on the platform (2). Thus by mani ulation of the control handlev (9) the space( discs (6) are moved to either the neutral position, shown' in Figure 1, or to drive or reverse the disc (7). Disc (7) is mounted on the upper end of a vertical screw (1 0) carried by the frame (11) and on the lower end thereof is attached, as by a bolt (12), the cutting head (13). The cutting head has a square (or other shaped) base plate (14) bossed as at (15) and recessed as at (16) to receive the *head of screw or bolt (12),v and is peripherally" flanged as at (17). Bolted as at (18) to the iianged portion (17) of the base plate (14) are knives (19), and the same bolts (18) retain inverted L-shaped brackets (20) having openings in their overhanging portions to receive pins (21). The pins (21) extend through the base plate (14) and carry a presser plate (22) which works in the space between the blades, and is normally pressed down by springs (28) about the pins (21) and pressing against stop collars (24) on the pins and against the brackets (20) to force the pins down. The presser plate (22 1D0` also serves to clean the blades or knives (19) 3. In a cutting machine, a cutter head havand to remove the objects cut thereby from ing a base plate, a pluralit of knives carried the blades or knives, and it also serves to at the edges of the base p ate and extending protect and keep clean the bolt (12) which downwardly past the under face of the base 5 lies in the space behind the presser plate. plate, supporting means for the knives When the handle is thrown to feed down the formed on the base plate and extending above screw or worm the cutter head is moved the upper face thereof,a plurality of angulartoward and through the object to be cut, and ly shaped brackets each disposed with an arm reverse movement of the screw will withdraw extendin inwardly and substantially ar- 10 the cutter head. The ear (.25) facilitates allel wit the upper face of the base p ate, 75 handling the presser plate; and a suitable securing means extending through the knives, drum or pulley (26) is mounted on the shaft the supporting means for the knives, and the 4) to actuate the same from a power plant brackets for holding the knives and brackets not shown). on the supporting means, a presser and clean- It is obvious that those skilled in the art ing plate below the base plate and of a size 80 may vary the details of construction as well to fit and move freely in an upwardly and as the arrangements of the parts without downwardly direction between the knives, a departing from the spirit of the invention, plurality of pins carried by the presser and and therefore it is not desired to be limited cleaning plate, and extending upwardly 2o to the foregoing disclosure except as may be through the base plate and through the in- 55 re uired by the claims. wardly extending arms of the brackets, and llVhat is claimed is cach pin carrying a coil spring on lts end l In a cutting machine, a cutter head havabove the base plate and abutting the under ing a base plate formed with upwardly exside of the inwardly extending arms of the tending peripheral anges, knives engaging brackets to normally urge the presser and 90 the flanges and extending down past the cleaning plate away from the base plate. under face of the base plate, a plurality of In testimony whereof, I aliix my signature L-shaped brackets on the flanges and each hereunto. disposed with one arm extending inwardly JACOBUS J. D. DE BOTH, I0 above the upper face ofthe base plate, means Admzz'strator of the Estae of F. U. J. 95

extending through the flanges and the knives de Both, Deceased. f and brackets for holding the latter on the flanges, a presser and cleaning plate mounted between the knives below the base plate, pins extendingr through the base plate and up- 100 wardly through the inwardly extending arms of the brackets and supporting the presser plate, and springs about the pins above the base plate and engaging the arms of the 40 brackets to normally urge the presser plate 105 away from the base plate.

2. In a cutting machine. a cutter head having a rectangular base plate formed with a continuous upwardly extending peripheral flange about its edges, knives carried by the 110 flange and extending down past the under face of the base plate,-a plurality of inverted L-shaped brackets on the fianges and each disposed with one arm extending inwardly above and substantially parallel to the upper 115 face of the base plate, securing means extending through the flanges and the knives and brackets for holding the knives and brackets on the ange, a rectangular presser and cleaning plate of substantially 120 the same size as the base plate mounted between the knives below the base plate, a plurality of pins extending throughv the base plate and upwardly through the inwardly extending arms of the brackets and support- 185 ing the presser plate, and springs about each of the pins above the base plate and engaging the under side of the arms of the brackets to normally urge the presser plate away from the base plate. 180 

